I get the “Invalid product licence” error

If you’re sure you’re typing the licence correctly, this problem could be related to an installation error.

On version 2.2 or newer

Please follow this procedure:

Remove the plane’s folder from X-Plane

Install the original aircraft folder (for instance, the one provided by Carenado)

Extract the rep files in a temporary folder

Copy the “REP” folder from the package to the “plugins” folder of the aircraft (do not copy it inside the main “plugins” folder of X-Plane)

Run X-Plane

Follow the onscreen instructions

Note:
When installing REP, make sure that inside the “plugins” folder of the aircraft, together with the plugin folders from Carenado there is another folder called “REP”. Inside it, you should find the “32”, the “64” and the “data” folders.

On version 2.1 or older

Please follow this procedure:

Remove the plane’s folder from X-Plane

Install the original aircraft folder (for instance, the one provided by Carenado)

Extract the rep files in a temporary folder

This is the important part: copy the files from the “airfoils” and “plugins” folders contained int the temporary REP folder, and paste them into the “airfoils” and “plugins” folder of the aircraft. Do not replace the folders “as-is” or their original content is deleted. If you’re using a Mac, you can get more info about merging two folders here: http://www.howtogeek.com/198043/how-to-merge-folders-on-mac-os-x-without-losing-all-your-files-seriously/

Copy the other REP folders/files into the aircraft folder

Run X-Plane

Note:
When installing REP, make sure that inside the “plugins” folder of the aircraft, together with the plugin folders from Carenado there is another folder called “REP”. Inside it, you should find the “32” and “64” folders.
Also, in the main folder of the aircraft you should have another folder called “REP” in which you should find the installation.cfg and configuration.cfg files.